Tonight the zoo is sleep-deprived. A white rabbit swallowed a piece of a fallen meteorite and transformed into a monster. Now he plans to seize the zoo and is creating from ordinary animals horrific hybrids — gorilla-fish, zebra-horns, and elephant-snakes. It seems no one is capable of stopping him. On the eve, the zoo brought in a new specimen — a wild mountain lion. To avoid becoming a boar-lion, he too must transform his small band of pets into fearless beasts.